import {
  document,
	window,
	HTMLCanvasElement,
	requestAnimationFrame,
	cancelAnimationFrame,
core,
	Event,
  Event0
} from "dhtml-weixin"
import * as THREE from './three/Three';	

import Stats from 'three/addons/libs/stats.module.js';

import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { OrbitControls0 } from 'three/addons/controls/OrbitControls0.js';

import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
import { DRACOLoader } from 'three/addons/loaders/DRACOLoader.js';
import { RGBELoader } from 'three/addons/loaders/RGBELoader.js';
var requestId
Page({
  onShareAppMessage(){
    return getApp().onShare()
  },
  onShareTimeline(){
     return {title:"ThreeX 2.0"}
  },
	onUnload() {
		cancelAnimationFrame(requestId, this.canvas)
		this.worker && this.worker.terminate()
if(this.canvas) this.canvas = null
		setTimeout(() => {
			if (this.renderer instanceof THREE.WebGLRenderer) {
				this.renderer.dispose()
				this.renderer.forceContextLoss()
				this.renderer.context = null
				this.renderer.domElement = null
				this.renderer = null
			}
		}, 0)
	},
  webgl_touch(e){
		const web_e = (window.platform=="devtools"?Event:Event0).fix(e)
		this.canvas.dispatchEvent(web_e)
  },
  onLoad() {
		document.createElementAsync("canvas", "webgl2").then(canvas => {
      this.canvas = canvas
      this.body_load(canvas).then()
    })
  },
  async body_load(canvas3d) {

  let camera, scene, renderer;
  let stats;

  let grid;
  let controls;

  const wheels = [];

  function init() {

    const container = document.getElementById( 'container' );

    renderer = new THREE.WebGLRenderer( { antialias: true } );
    renderer.setPixelRatio( window.devicePixelRatio );
    renderer.setSize( window.innerWidth, window.innerHeight );
    renderer.setAnimationLoop( render );
    renderer.toneMapping = THREE.ACESFilmicToneMapping;
    renderer.toneMappingExposure = 0.85;
    container.appendChild( renderer.domElement );

    window.addEventListener( 'resize', onWindowResize );

    stats = new Stats();
    container.appendChild( stats.dom );

    //

    camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 0.1, 100 );
    camera.position.set( 4.25, 1.4, - 4.5 );

    controls = new (window.platform=="devtools"?OrbitControls:OrbitControls0)( camera, container );
    controls.maxDistance = 9;
    controls.maxPolarAngle = THREE.MathUtils.degToRad( 90 );
    controls.target.set( 0, 0.5, 0 );
    controls.update();

    scene = new THREE.Scene();
    scene.background = new THREE.Color( 0x333333 );
    scene.environment = new RGBELoader().load( 'textures/equirectangular/venice_sunset_1k.hdr' );
    scene.environment.mapping = THREE.EquirectangularReflectionMapping;
    scene.fog = new THREE.Fog( 0x333333, 10, 15 );

    grid = new THREE.GridHelper( 20, 40, 0xffffff, 0xffffff );
    grid.material.opacity = 0.2;
    grid.material.depthWrite = false;
    grid.material.transparent = true;
    scene.add( grid );

    // materials

    const bodyMaterial = new THREE.MeshPhysicalMaterial( {
      color: 0xff0000, metalness: 1.0, roughness: 0.5, clearcoat: 1.0, clearcoatRoughness: 0.03
    } );

    const detailsMaterial = new THREE.MeshStandardMaterial( {
      color: 0xffffff, metalness: 1.0, roughness: 0.5
    } );

    const glassMaterial = new THREE.MeshPhysicalMaterial( {
      color: 0xffffff, metalness: 0.25, roughness: 0, transmission: 1.0
    } );

    const bodyColorInput = document.getElementById( 'body-color' );
    bodyColorInput.addEventListener( 'input', function () {

      bodyMaterial.color.set( this.value );

    } );

    const detailsColorInput = document.getElementById( 'details-color' );
    detailsColorInput.addEventListener( 'input', function () {

      detailsMaterial.color.set( this.value );

    } );

    const glassColorInput = document.getElementById( 'glass-color' );
    glassColorInput.addEventListener( 'input', function () {

      glassMaterial.color.set( this.value );

    } );

    // Car

    const shadow = new THREE.TextureLoader().load( 'models/gltf/ferrari_ao.png' );

    const dracoLoader = new DRACOLoader();
    dracoLoader.setDecoderPath( 'jsm/libs/draco/gltf/' );

    const loader = new GLTFLoader();
    loader.setDRACOLoader( dracoLoader );

    loader.load( 'models/gltf/ferrari.glb', function ( gltf ) {

      const carModel = gltf.scene.children[ 0 ];

      carModel.getObjectByName( 'body' ).material = bodyMaterial;

      carModel.getObjectByName( 'rim_fl' ).material = detailsMaterial;
      carModel.getObjectByName( 'rim_fr' ).material = detailsMaterial;
      carModel.getObjectByName( 'rim_rr' ).material = detailsMaterial;
      carModel.getObjectByName( 'rim_rl' ).material = detailsMaterial;
      carModel.getObjectByName( 'trim' ).material = detailsMaterial;

      carModel.getObjectByName( 'glass' ).material = glassMaterial;

      wheels.push(
        carModel.getObjectByName( 'wheel_fl' ),
        carModel.getObjectByName( 'wheel_fr' ),
        carModel.getObjectByName( 'wheel_rl' ),
        carModel.getObjectByName( 'wheel_rr' )
      );

      // shadow
      const mesh = new THREE.Mesh(
        new THREE.PlaneGeometry( 0.655 * 4, 1.3 * 4 ),
        new THREE.MeshBasicMaterial( {
          map: shadow, blending: THREE.MultiplyBlending, toneMapped: false, transparent: true
        } )
      );
      mesh.rotation.x = - Math.PI / 2;
      mesh.renderOrder = 2;
      carModel.add( mesh );

      scene.add( carModel );

    } );

  }

  function onWindowResize() {

    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();

    renderer.setSize( window.innerWidth, window.innerHeight );

  }

  function render() {

    controls.update();

    const time = - performance.now() / 1000;

    for ( let i = 0; i < wheels.length; i ++ ) {

      wheels[ i ].rotation.x = time * Math.PI * 2;

    }

    grid.position.z = - ( time ) % 1;

    renderer.render( scene, camera );

    stats.update();

  }

  init();
  }
})